在onCreate()中setContentView()后，加入以下代码显示和隐藏状态栏。
getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN) //隐藏状态栏
getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN) //显示状态栏
Android Studio如何隐藏系统的状态栏
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Origin blog.csdn.net/qq_42257666/article/details/120844311
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